@article{ref1,
title="The informative value of various patterns of runway light marking",
journal="Aeromedica acta",
year="1964",
author="Kylstra, J. and Hoogerheide, J.",
volume="9",
number="",
pages="21-29",
abstract="<p>[Abstract unavailable]</p><p>Language: nl</p>",
language="nl",
issn="0568-0549",
doi="",
url="http://dx.doi.org/"
}